Answer: september 15 saplings, 43 saplings
Explanation:
i need money, and i need it now! sorry, your question just reminded me of that commercial.
the least number of saplings was planted in September and it was 15 saplings.
now the second part of the question i added up all the saplings and got 520. divided by 12 months in the year is 43.333 rounded is 43 saplings